Hello! i need with this question asap ! ; -;

match the following chemical reactions: a, b, c, and d are elements.

a + bc  ac + b combustion
ab + bd  ac + bd synthesis
a + o2 - ao combustion
ab -- a + b single replacement
a + b - ab double replacement
ac + o2 - co2 + h2o decomposition

A + BC → AC + B            Single Replacement

AB + CD → AC + BD       Double Replacement

A + O₂ → AO                   Combustion

AB → A + B                      Decomposition

A + B → AB                       Synthesis  

AC + O₂ → CO₂ + H₂O    Combustion  

Explanation:

Single replacement is a type of chemical reaction where an element reacts with a compound and takes the place of another element in that compound.

So, A + BC → AC + B is an example for single replacement reaction.

Here, A replaces B in the compound BC.

Double Replacement is a type of chemical reaction where two compounds react, and the positive ions (cation) and the negative ions (anion) of the two reactants switch places, forming two new compounds or products.

So, AB + CD → AC + BD is an example for double replacement reaction.

Here, A replaces C in the compound CD and B replaces D in the compound CD.

Combustion reactions always involve molecular oxygen O₂. Anytime anything burns (in the usual sense), it is a combustion reaction. Combustion reactions are almost always exothermic (i.e., they give off heat).

So, A + O₂ → AO and AC + O₂ → CO₂ + H₂O are examples of combustion reactions.

Decomposition reactions is a type of chemical reaction in which a single compound breaks down into two or more elements or new compounds. These reactions often involve an energy source such as heat, light, or electricity that breaks apart the bonds of compounds.

So, AB → A + B is an example for decomposition reactions.

where Ab is decomposed for A and B.

Synthesis   is a type of reaction in which multiple reactants combine to form a single product. Synthesis reactions release energy in the form of heat and light, so they are exothermic.

So, A + B → AB is an examples for the synthesis reactions.

The density would be 1.622